Fix black formatting in read_artifacts symmetry tests

https://claude.ai/code/session_01EctVW1VcbY2LzAdfZrGBB5

Author: claude

tests/symmetry/read_artifacts/dataset/test_build_dataset.py

@@ -70,9 +70,7 @@ def test_build_dataset_summary(self, source_type):
             excludeFiles=["datasetSummary.json", "jsonDocuments"],
         )
 
-        assert len(report) == 0, (
-            f"Dataset summary mismatch in {source_type}:\n" + "\n".join(report)
-        )
+        assert len(report) == 0, f"Dataset summary mismatch in {source_type}:\n" + "\n".join(report)
 
     def test_build_dataset_documents(self, source_type):
         """Verify that every exported JSON document can be loaded from session DBs.

tests/symmetry/read_artifacts/dataset/test_download_ingested.py

@@ -98,9 +98,7 @@ def _filter_dot_underscore(files: list[str]) -> list[str]:
             excludeFields=["documentCounts"],
         )
 
-        assert len(report) == 0, (
-            f"Dataset summary mismatch in {source_type}:\n" + "\n".join(report)
-        )
+        assert len(report) == 0, f"Dataset summary mismatch in {source_type}:\n" + "\n".join(report)
 
     def test_download_ingested_document_counts(self, source_type):
         """Verify document counts per session match expected values."""